香港昆蟲報 香港昆蟲報 6 7 Hong Kong Entomological Bulletin Chrysomelidae of Hong Kong Part 3 Chrysomelidae of Hong Kong Part 3 Hong Kong Entomological Bulletin Subfamily Galerucinae Subfamily Galerucinae THE KEYS Chrysomelidae of Hong Kong Part 3 Key to tribes of Galerucinae 1. Mesosternum free, horizontal or inclined, not covered by Subfamily Galerucinae metasternum. Anterior of mesosternum meeting posterior of the prosternum. 2 － Mesosternum largely covered by an anterior process of the Paul Aston metasternum as in sketch (right) of the underside of E-mail: [email protected] Gallerucida singularis . Tribe Gallerucidini Gallerucida singularis - shaded area - 2. Occiput and pronotum deeply punctured; antennal insertions ABSTRACT anterior of mesosternum forming a generally close, at level of anterior margins of eyes or further This is the third part of a series of papers on the process covering the posterior of the Key words: anterior (as in photo of the head and pronotum of Pyrrhalta prosternum (centre). Figure Paul Aston Chrysomelidae occurring in Hong Kong. The current paper Chrysomelidae, Galerucinae, Coleoptera, kwangtungensis right). Last abdominal sternite of male with a deals with the large subfamily Galerucinae. Thirty-seven Hong Kong. triangular or rounded depression with posterior border often species are listed, all of which are covered by the keys. emarginate, but never tri-lobed . Tribe Galerucini － Occiput and pronotum not heavily punctured, antennal insertions generally separated, situated near, but behind, INTRODUCTION anterior borders of eyes, but when weakly separated placed further forward; last sternite of male 3-lobed, with medium lobe The Galerucinae is the most frequently encountered and speciose subfamily of the Chrysomelidae, or leaf beetles always distinct . Tribe Luperini as they are commonly known. Members of the subfamily are characterised by having the mouth placed anteriorly; antennae not widely separated at the base, generally closely approximate; elytra more or less soft in texture; posterior femora not usually thickened, or if thickened, not significantly more so than in the two anterior pairs of legs. Gallerucidini In some species of Galerucinae, the male shows variously enlarged and modified segments of the antennae. When This tribe is easily identified by the mesosternum projecting this occurs the basal segments below the enlargement are proportionally shorter and stouter as compared to the forward through the mid coxae and covering part or most of female. The genera Taumacera and Agetocera are examples of this in Hong Kong. Similarly, enlargement occurs on the metasternum. Single genus and species in Hong Kong. the first tarsal segment of the anterior tarsi in some Hong Kong species of the genus Mimastra. 01. Gallerucida singularis Harold, 1880 Length 7-8.5mm. Elytra variable in colour from pale to reddish with a METHODS purplish sheen and generally with the humeral and apical angles As in Part 2 of this series of articles (Aston 2009), the keys have been built on and modified from Gressitt and yellowish. The latter with usually two, occasionally three black spots. Kimoto (1963a and 1963b), and are best used for fresh specimens, though older specimens should pose no Hong Kong specimens have additional spots on the humeral angles. problem for more experienced users. Note that colours do generally become darker in older specimens. It is very Underparts dark brown. Antennae segment 2 is the shortest, 3 sightly likely that many more species will be discovered in Hong Kong, but most or all of our commonly occurring species longer and 4 twice as long as 3. This species was first recorded in Hong should be adequately covered in the keys. Kong by Hadden in 1932 (Bishop Museum). Pale form Host: Japanese Smart-weed Polygonum japonicum Meisn. In the systematic section, for each species are given the length and description. Host plant information, if known, is generally taken from existing literature on south China, and is only listed if the species of plant is included in the Imago: March–December. Agriculture, Fisheries and Conservation Department Bulletin 1 (revised) Checklist of Hong Kong Plants 2004. The Distribution: Himalayas, northern Vietnam, China (Guangdong, Fujian, period when adults can be seen in Hong Kong is also given, mostly from personal notes of the author; also for south Sichuan). China, as indicated by literature records. World distribution is given for each species. Note: Gressitt and Kimoto (1963a) treated Gallerucida gebieni (Weise), as a synonym of G. singularis. However Kimoto (1967) retracted this, Darker purplish form and recorded his specimens from Hong Kong as gebieni, which he subsequently moved to the genus Leptarthra. In a more recent publication (Kimoto, 1989), he refers to these specimens as G. singularis, which I have followed here, mainly because the anterior process of the metasternum is not a character of the genus Leptarthra. Mesosternum largely covered by an anterior process of the metasternum is diagnostic of this tribe. Volume 1 Issue no. 2 w Nov 2009 © Hong Kong Entomological Society © Hong Kong Entomological Society Volume 1 Issue no. 2 w Nov 2009 香港昆蟲報 香港昆蟲報 6 7 Hong Kong Entomological Bulletin Chrysomelidae of Hong Kong Part 3 Chrysomelidae of Hong Kong Part 3 Hong Kong Entomological Bulletin Subfamily Galerucinae Subfamily Galerucinae THE KEYS Chrysomelidae of Hong Kong Part 3 Key to tribes of Galerucinae 1. Mesosternum free, horizontal or inclined, not covered by Subfamily Galerucinae metasternum. Anterior of mesosternum meeting posterior of the prosternum. 2 － Mesosternum largely covered by an anterior process of the Paul Aston metasternum as in sketch (right) of the underside of E-mail: [email protected] Gallerucida singularis . Tribe Gallerucidini Gallerucida singularis - shaded area - 2. Occiput and pronotum deeply punctured; antennal insertions ABSTRACT anterior of mesosternum forming a generally close, at level of anterior margins of eyes or further This is the third part of a series of papers on the process covering the posterior of the Key words: anterior (as in photo of the head and pronotum of Pyrrhalta prosternum (centre). Figure Paul Aston Chrysomelidae occurring in Hong Kong. The current paper Chrysomelidae, Galerucinae, Coleoptera, kwangtungensis right). Last abdominal sternite of male with a deals with the large subfamily Galerucinae. Thirty-seven Hong Kong. triangular or rounded depression with posterior border often species are listed, all of which are covered by the keys. emarginate, but never tri-lobed . Tribe Galerucini － Occiput and pronotum not heavily punctured, antennal insertions generally separated, situated near, but behind, INTRODUCTION anterior borders of eyes, but when weakly separated placed further forward; last sternite of male 3-lobed, with medium lobe The Galerucinae is the most frequently encountered and speciose subfamily of the Chrysomelidae, or leaf beetles always distinct . Tribe Luperini as they are commonly known. Members of the subfamily are characterised by having the mouth placed anteriorly; antennae not widely separated at the base, generally closely approximate; elytra more or less soft in texture; posterior femora not usually thickened, or if thickened, not significantly more so than in the two anterior pairs of legs. Gallerucidini In some species of Galerucinae, the male shows variously enlarged and modified segments of the antennae. When This tribe is easily identified by the mesosternum projecting this occurs the basal segments below the enlargement are proportionally shorter and stouter as compared to the forward through the mid coxae and covering part or most of female. The genera Taumacera and Agetocera are examples of this in Hong Kong. Similarly, enlargement occurs on the metasternum. Single genus and species in Hong Kong. the first tarsal segment of the anterior tarsi in some Hong Kong species of the genus Mimastra. 01. Gallerucida singularis Harold, 1880 Length 7-8.5mm. Elytra variable in colour from pale to reddish with a METHODS purplish sheen and generally with the humeral and apical angles As in Part 2 of this series of articles (Aston 2009), the keys have been built on and modified from Gressitt and yellowish. The latter with usually two, occasionally three black spots. Kimoto (1963a and 1963b), and are best used for fresh specimens, though older specimens should pose no Hong Kong specimens have additional spots on the humeral angles. problem for more experienced users. Note that colours do generally become darker in older specimens. It is very Underparts dark brown. Antennae segment 2 is the shortest, 3 sightly likely that many more species will be discovered in Hong Kong, but most or all of our commonly occurring species longer and 4 twice as long as 3. This species was first recorded in Hong should be adequately covered in the keys. Kong by Hadden in 1932 (Bishop Museum). Pale form Host: Japanese Smart-weed Polygonum japonicum Meisn. In the systematic section, for each species are given the length and description. Host plant information, if known, is generally taken from existing literature on south China, and is only listed if the species of plant is included in the Imago: March–December. Agriculture, Fisheries and Conservation Department Bulletin 1 (revised) Checklist of Hong Kong Plants 2004. The Distribution: Himalayas, northern Vietnam, China (Guangdong, Fujian, period when adults can be seen in Hong Kong is also given, mostly from personal notes of the author; also for south Sichuan). China, as indicated by literature records. World distribution is given for each species. Note: Gressitt and Kimoto (1963a) treated Gallerucida gebieni (Weise), as a synonym of G. singularis. However Kimoto (1967) retracted this, Darker purplish form and recorded his specimens from Hong Kong as gebieni, which he subsequently moved to the genus Leptarthra. In a more recent publication (Kimoto, 1989), he refers to these specimens as G. singularis, which I have followed here, mainly because the anterior process of the metasternum is not a character of the genus Leptarthra. Mesosternum largely covered by an anterior process of the metasternum is diagnostic of this tribe. Volume 1 Issue no.